#include <iostream>
#include <fstream>
#include <string>

int main()
{
    // std::string s1;
    // std::cin >> s1;
    // std::cout << s1;
    
    //----------------------------------------------
    std::ifstream in("test.txt");
    std::string s2;
    std::getline(in, s2);//没有读到\n
    std::cout << s2;
    return 0;
}